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What is the electronic configuration of the potassium ion (K+)?

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Question: What is the electronic configuration of the potassium ion (K+)?

Options:

  1. 1s2 2s2 2p6 3s2
  2. 1s2 2s2 2p6
  3. 1s2 2s2 2p6 3s1
  4. 1s2 2s2 2p6 3s2 3p1

Correct Answer: 1s2 2s2 2p6

Solution: 

The potassium ion (K+) loses one electron, resulting in the configuration 1s2 2s2 2p6.

What is the electronic configuration of the potassium ion (K+)?

Practice Questions

Q1
What is the electronic configuration of the potassium ion (K+)?
  1. 1s2 2s2 2p6 3s2
  2. 1s2 2s2 2p6
  3. 1s2 2s2 2p6 3s1
  4. 1s2 2s2 2p6 3s2 3p1

Questions & Step-by-Step Solutions

What is the electronic configuration of the potassium ion (K+)?
Correct Answer: 1s2 2s2 2p6
  • Step 1: Identify the atomic number of potassium (K), which is 19. This means a neutral potassium atom has 19 electrons.
  • Step 2: Write the electronic configuration for a neutral potassium atom. It is 1s2 2s2 2p6 3s1.
  • Step 3: Understand that the potassium ion (K+) is formed when potassium loses one electron.
  • Step 4: Remove one electron from the outermost shell (3s1) of the neutral potassium configuration.
  • Step 5: The new electronic configuration for K+ is now 1s2 2s2 2p6, as the 3s electron is lost.
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